# def jiecheng(n):
#     if(n==1):
#         return 1
#     else:
#         return n*jiecheng(n-1)
#
# a=jiecheng(5)
# print(a)

def Fib(n):
    if(n==1):
        return 1
    else:
        return n*jiecheng(n-1)

a=jiecheng(5)
print(a)
